30682

Appears in sequences

• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite EDI = Edingtonite Ba2[Al4Si6O20].8H2O starting with a T1 atom.at n=6A019012
• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite THO = Thomsonite Na4Ca8[Al20Si20O80].24H2O starting at a T3 atom.at n=6A019061
• G.f. A(x) satisfies: 1 = Sum_{n>=0} ( (1+x)^(n+1) - A(x) )^n.at n=6A304642
• Number of length-n binary words w such that ww is rich.at n=20A306314
• Sum of the even parts in the partitions of n into 10 parts.at n=36A309664
• a(n) = binomial(n+3, 4) + binomial(n+1, 3) + 1.at n=27A368881